Package org.apache.axis2.engine

Class DeployableChain<T>

java.lang.Object

org.apache.axis2.engine.DeployableChain<T>

public class DeployableChain<T>
extends Object

A DeployableChain is a container which manages dependencies between Deployables. You deploy() them in, then call rebuild() which will set up a chain, correctly ordered according to the constraints in the Deployables.

Constructor Summary

Constructors

Constructor	Description
DeployableChain()

Method Summary

Modifier and Type	Method	Description
void	addRelationship(String before, String after)	Adds a before/after relationship to the active constraints.
void	deploy(Deployable deployable)	Deploy a Deployable into this chain.
List<T>	getChain()	Get the chain - once rebuild() has been called this will be the chain of target objects.
void	rebuild()	Taking into account all the active constraints, order the list.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DeployableChain

public DeployableChain()

Method Details

deploy

public void deploy(Deployable deployable)
            throws Exception

Deploy a Deployable into this chain. Note that this does NOT order yet. The idea is to deploy everything first, then call rebuild() to generate the fully ordered chain. This method will validate the Deployable, including confirming that it's compatible with any previously deployed item of the same name.

Parameters:

deployable - Deployable to deploy.

Throws:

Exception - if there is a deployment error.

rebuild

public void rebuild()
             throws Exception

Taking into account all the active constraints, order the list. This blows away the old order. Could improve this slightly with a "dirty" flag.

Throws:

Exception - if there's an ordering conflict

addRelationship

public void addRelationship(String before,
 String after)

Adds a before/after relationship to the active constraints.

Parameters:

before - name of the Deployable that must come first

after - name of the Deployable that must come later

getChain

public List<T> getChain()

Get the chain - once rebuild() has been called this will be the chain of target objects.

Returns:

a List of target objects in the correct order